機器
activity
build
building materials
construction
construction material
conveyor
conveyor belt
crush
crusher
dust
ecology
environment
equipment
excavation
excavator
factory
gravel
heap
heavy
hill
industrial
industry
limestone
machinery
manufacturing
mine
mining
mining industry
mining machine
mountain
occupation
outdoor
pit
plant
processing
production
quarry
quarrying
raw
resources
rock
sand
stone
stone crusher
stone pit
stonepit
technology
transport
transportation
work
worker
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